000
AXNT20 KNHC 202323
TWDAT 

TROPICAL WEATHER DISCUSSION...     
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
805 PM EDT SUN APR 20 2008

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL 
AMERICA...THE GULF OF MEXICO...THE CARIBBEAN SEA...NORTHERN 
SECTIONS OF SOUTH AMERICA...AND THE ATLANTIC OCEAN TO THE 
AFRICAN COAST FROM THE EQUATOR TO 32N. THE FOLLOWING
INFORMATION IS BASED ON SATELLITE IMAGERY...METEOROLOGICAL 
ANALYSIS...WEATHER OBSERVATIONS...AND RADAR.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
2315 UTC.

...THE ITCZ...

ITCZ AXIS IS CENTERED ALONG 5N10W 3N30W 3N30W TO THE EQUATOR AT 
50W.  SCATTERED MODERATE TO ISOLATED STRONG CONVECTION IS FROM 
4N-6N BETWEEN 16W-19W...AND FROM 3N-5N BETWEEN 24W-27W.  
SCATTERED MODERATE CONVECTION IS FROM 2N-4N BETWEEN 
37W-42W...AND FROM 2N-4N BETWEEN 46W-50W.  

...DISCUSSION...

GULF OF MEXICO...
AS OF 2100 UTC...A WEAK COLD FRONT EXTENDS FROM S FLORIDA TO THE 
CENTRAL GULF OF MEXICO ALONG 28N80W 26N84W 25N90W.  SCATTERED 
SHOWERS ARE WITHIN 90 NM S OF FRONT.  A 1018 MB HIGH IS CENTERED 
S OF LOUISIANA NEAR 29N88W PRODUCING FAIR WEATHER.  BROKEN TO 
OVERCAST MULTILAYERED CLOUDS ARE OVER SE TEXAS AND THE NW GULF 
OF MEXICO.  SURFACE WINDS RANGE FROM 5-15 KT OVER THE GULF.  IN 
THE UPPER LEVELS... AN UPPER LEVEL RIDGE IS OVER THE GULF WITH 
AXIS ALONG 92W.  A BAND OF UPPER LEVEL MOISTURE IS OVER THE N 
GULF N OF 26N.  STRONG SUBSIDENCE IS OVER THE REMAINDER OF THE 
GULF.  EXPECT... THE COLD FRONT TO EXTEND FROM THE BAHAMAS TO 
THE STRAITS OF FLORIDA IN 24 HOURS WITH VERY LITTLE 
PRECIPITATION. 
 
CARIBBEAN SEA...
FRESH TRADEWINDS ARE OVER THE CARIBBEAN SEA WITH THE STRONGEST 
WINDS ALONG THE COAST OF N COLOMBIA.  AREAS OF SCATTERED 
MODERATE CONVECTION ARE NOTED INLAND OVER N COLOMBIA...PANAMA... 
AND COSTA RICA.  SCATTERED SHOWERS ARE OVER THE HIGHER 
ELEVATIONS OF E CUBA...JAMAICA...AND HISPANIOLA.  MORE SCATTERED 
SHOWERS ARE OVER THE LEEWARD ISLANDS FROM 15N-20N BETWEEN 
58W-62W.  IN THE UPPER LEVELS...A RIDGE IS OVER THE W CARIBBEAN 
W OF 80W.  AN UPPER LEVEL TROUGH IS OVER THE E CARIBBEAN E OF 
80W.  STRONG SUBSIDENCE COVERS THE SEA.  A BAND OF SCATTERED TO 
BROKEN HIGH CLOUDS IS HOWEVER OVER THE SRN CARIBBEAN S OF 14N.  
EXPECT... CONTINUED CONVECTION OVER PANAMA AND COSTA RICA DURING 
THE NEXT 24 HOURS.     

ATLANTIC OCEAN...
AS OF 2100 UTC...A COLD FRONT ENTERS THE W ATLANTIC NEAR 32N77W 
AND EXTENDS SW TO S FLORIDA NEAR 28N80W.  A PREFRONTAL TROUGH IS 
FROM 32N75W TO 28N78W.  SCATTERED MODERATE CONVECTION IS WITHIN 
120 NM E OF THE FRONT.  A SURFACE TROUGH...THE REMNANTS OF A 
COLD FRONT...IS OVER THE CENTRAL ATLANTIC ALONG 32N52W 26N60W 
22N68W.  SCATTERED SHOWERS ARE WITHIN 90 NM OF THE FRONT.  A 
1024 MB HIGH IS OVER THE E ATLANTIC NEAR 31N33W.  ANTICYCLONIC 
SURFACE FLOW IS N OF 10N BETWEEN 20W-50W.  IN THE UPPER 
LEVELS... A TROUGH IS W OF 60W.  A BROAD RIDGE IS N OF 20N 
BETWEEN 35W-60W.  A TROUGH IS N OF 20N E OF 35W.  ZONAL FLOW IS 
OVER THE TROPICS S OF 20N BETWEEN THE LESSER ANTILLES AND W 
AFRICA.  EXPECT THE COLD FRONT AND THE SURFACE TROUGH OVER THE 
CENTRAL ATLANTIC TO MOVER SLOWLY E DURING THE NEXT 24 HOURS WITH 
SCATTERED SHOWERS AND THUNDERSTORMS. 

$$
FORMOSA